Mixer-beater shaft lock



Sept. 14, 1943 G. L; MOELLER MIXER-BEATER SHAFT LOCK Filed April 27, 1942 Patented Sept. 14, 1943 Louis. M., yas signor to f e Application Aprile?, lsizlzseriei-Ne 446,651;

imams. @L12-.Steen Mypresent' invention relates to ashaftrlock particularly designed kforlooking thebeaterv shafts of `a food mixer or the flik .ein` operative position;

One'pbject of the invention is'to` provide la,

shaft lockfof simple and inexpensive consti-fiction. Another object is to provide asliaftilckwhich permits mere insertion of'. the beater shaft'to operative position and tli'en automatically Tlocks it in such position-release' (if the shaft'thereaiter being eiected by Ymovement .o'fethe -loek plate' manually .to a releasingposition.- 'i

yMore particularl it is' fmy means'for locking abeater shaft'linfoperative position, including a'rnovable-lck plate having an edge engageable in 'anannulargroove of the beater shaft Linder constraint of a spring, and

beingzmanuaii'y disengeg'eaijie.therefrom*ier` lreleasing the Ybeater shaft from operative position.

with tneseend ether objects in view, my invention fconsistsvin theconstruction.arrangement and combination o-f1 thefvarious parts offn'iy devieewhereby thekobjects' contemplated hare at-v tainecl, as hereinafter more f ully set'forth? 'pointed out in my claims, and illustrated in tl'ie'aeiiorn'-rpanying drawing; wherein y I Figure" 1 is a vside elevation o fv a portion of a food mixermotoranlgearY housing Withrny vshaft leekepp1iedthereto pets*ofthe mixe; and usci; being shownAY in section;

gear housing and sh'aft leek cooplftingfvvith the shaft'fbft'lie beaterj'- 9 vI ig'furef3'is asectional Vievv'on the line 3;-3 of Figure l sliovvingA ther'nounting of thelok'platefin'po'sitionand a parti'g'ilV bottom planviewof the geef heusir 1g';g l i" A"Figure 4F82. plan ,View of@ moid fQrm Of constructionshowin it :ass*oeiated v vitli' a gear housing lthat is ShQWIl in'seotion; and

Ii"ig "l`1re" A isa s'ef'zti'o'r'alV View on the line 5&5 of Figure 4. r y l 'Qn the accompanying v`drawing I- have 4used the reference numeral 'I II. to indicate r`a -`mixer inoti, and I2 the'gearhousingniounted' thereon-. 1The' mixer may be of any typefsuch 'as' that shown in Kommer-Patent ANctl`2-,.11'31,'29'0;1' ii-.september '27, 1938. The ,mixer illustrated inthepreset `'draw-1` The gear heii'sing -Ii.liasa.partit-ion.y I3 provided with Sa pair'lof bearings 'IA;"-.lRotatable :in the bearings .I4 are driving[sleevesIli,l geared together by lgea'rs. :I 6r Whichare; rotated by a the .usualistep down. `gearing arrangement from ithe mento-ri).r The gears I6 are secured tdthesleeves I5.,fa`nd .ai

packing I'I is provided for each sleeve to prevent lubricant from leakingioutof the gear housing I2 above the partition I3` The beater shafts are shown at I8, a beater I9 being illustrated on one tively drivenzbyithe"drivingsleeves `ILE- by means s of ppositellug's'l pinched into thebeat'ershafts and enterin'gslots 2l .in th'e lower ends ,of the sleeves; yflheshaftsl aretape'red' or pointedat their upperends, as indi'CatedatIZL'and are provided With'annular grooves ZSQrpurDOSeswhich Will'lie'reinaftr appear. y

`I provideia' .lock elementlL' in-'the form Oiga plate of suitable composition or'metal',"and slids y ably mounted between La I pair of ,run-.Ways or guides 24 of the .gear housing l2 `-Thelock plate L has a neck 25 slidable infa slot 2S formed between v the run-'Ways 24'. YThe neck terminates in assembled by sliding into grooves 32 in the run` inerme-'r' nelqek the ,eiidejfpin' 4u, 'thesprjmg ssafpeingn'ipiintee ,en

exterieure-)bereuen @faire fom f *ffrigures-1,izeana3' 1:,Tiie perisar1-iin operaiing-msitie .n .1

. .When fits desir Able to release the ,'.beiater' .I8 idr ,removing thebeat'e 'i I 9 l,forcleaiif mee-,purpeseseeis merelynasse fr tlrush' the hendie 21 in es 'far as it will gewhereupo'niit assumes the dash-line position shown in Figure smenpercsrherrif @f3.8 E. "riii@key#helesansA position, it Will be noted, have the portions 31 thereof aligned Withl the sleeves I5, and the smaller portions .38 `thereof removed from thev annular grooves 23. Accordingly, the shafts IB can drop out of position, the parts 31 of the keyhole slots being larger in diameter than the di'V ameter across the driving lugs 2li.`

Consequently, when it is desirable to insert the l beater shafts in position they may be merely thrust through the retainer plate 3|, which'is' provided with guide perforations to receive them, and the taperedupper ends 22 of they beater shafts will force the lock plate L toward the right, against the bias of the spring 36, until the beater shafts are in 4operating position. If the driving lugs-2|) are not aligned with 'the slots 2|, the shafts may be rotated until they Vdo become aligned, whereupon the shafts may be pushed up to their final position. In such nal position the `annular grooves 23 register with the lock plate L so that the small portions 38 of the key-hole slots may enter the annular grooves' to the locked position shown in Figure 1 under the action of the spring 36. f

with this form of the invention the knot 21`a is manually pulled outward A,for releasingr the. beater shafts |83. When re-inserting the beater shaftsthe tapered ends 22a thereof 'engage the edges 38a of the lockbar L and force them back against the bias of the spring 33a untilthey can snap into the annular groove 23a. Due to the pivot at 39, one beater shaft Il!a at a time may be inserted, or both'of them maybe simultane-v ously inserted, as desired. a

In Figure a formed sheet metal coverl 4| is shown for the upper end of the beater shaft |83. A cover 4|- is provided for each shaft but they have been omitted from Figure 4 to bettershoW the coaction ofthe edges 38a of the lock bar L' withithe grooves v23aof the beater shafts.

Somegchanges'may be made-in the construetion and arrangement of they parts of m'yfdevice Without departing from the real spirit and purpose of my invention, and itis my yintention to cover bymy claims anyV modified forms Aof struc-v ture,I or use vof Vmeclrianical equivalents, which may-be reasonably includedwithin theirxscope.

I claim as my invention: g

Y1. In a mixer-beater shaft lock, alock elef ment movably mountedina gear housing ofv a mixer having a pair .of beater shafts, said shafts being annularly grooved, said lock, element `hav.- ing key-hole slots therein adapted to receivesaid, beater shafts through the larger parts of the slots, spring means moving said lock element,V

in a direction for the smaller parts of'said slots to simultaneously coact with y said annular grooves of said beatervshafts, Iandl a handle on said lock plate velement to move itin opposition `lock element to move it in a direction for engagement of its edges in said grooves.

` 3. A shaft lock of the character described for va shaft insertable into a driving sleeve rotatably mounted in a gear casing or the like comprising '.a lock element movably mounted in said gear I` casing in a plane substantially normal to the axis of rotation of said shaft, said shaft having an annular groove therein to receive an edge of said v loclr` plate, a handle for retracting said lock eleto said spring means ,to "thereby, release said .Y

beater shafts, the inner ends; of said. beater shafts being tapered to move'said lock element in opposition-topsaid springjmeans to a position permitting insertionof the shafts to operative position. y Y Y 2. In a mixer-beater shaft lock, alock element mounted for sliding movement in a gearhous-` ing of a mixer having apairof beater shafts,` said shafts being annularly grooved to receive ment, and spring means for moving said lock element to engaging position with relation to the groove of said shaft only when said shaft is in a position to be driven by said driving sleeve, said shaft having its end tapered to effect movement of 4said lock element to a position permitting insertion of said shaft to operating position during the inserting operation.

4. In a mixer-beater shaft lock, alock bar movably mounted in a gear housing of a mixer having a pair of beater shafts, said shafts being annularly grooved,a slide pin pivotally connected with said vloclgbar with parts of the lock bar on opposite sides of the beater engageable in said grooves, spring means associated withsaid slide pin to move said` lock bar in a direction for engagement in said grooves, `and a handle on said slide pin for sliding it and thereby moving said lock bar in opposition to said spring means.

5. In a mixer-beater shaft lock, a lock bar movably mounted in a gear housing of a mixer having -a pair of beatershafts, said shafts being annularly grooved,l a slide pin connected with said lock bar Withparts of vthe lock bar on opposite sides .of the beater engageable in said grooves, spring means associated with said slide pin to move said lock bar in a direction for engagement in said grooves, and a handle on said slide pin for `sliding it and therebymoving said lock bar in opposition to saidspring means,y the inner ends of said beater shafts being ltapered to movesaid lock bar to a positionpermitting insertion of the shafts to operative position.

` i 6. In a mixer-beater shaft lock, a lock element movablymounted irl-a, gear housing of a mixer having a beater shaft, said shaft being annufor the smaller part of the slot to coact with said annular groove of said beater-shaft, the Yinner end of said beater-shaftbeing tapered to move said lock element in opposition to said spring means, to a position permitting insertion of the shaft to operative position. A

7.-,In a mixer-beater shaft lock,[a lock'element mounted for slidingmovement in a gear housing of a'mixer having -a'beater shaft, said shaft being annularly grooved to receive; an edgeof said lock element only when said shaft is in a position of operative engagement with respect to the' vbeater-shaft drive mechanism in said 'gear housing,A and spring means associated with. said lock'element to move it in a direction for engagement of'its edge in vsaid groove.

. GEoRGE AL. MOELLER. 

